共 23 条
[17]
STEWART AL, 1987, DEV MED CHILD NEUROL, V29, P3
[19]
ABC of preterm birth - Epidemiology of preterm birth
[J].
BRITISH MEDICAL JOURNAL,
2004, 329 (7467)
:675-678
[20]
WHITELAW A, 1990, ARCH DIS CHILD-FETAL, V65, P3